Authors
University of Technology-Iraq, Baghdad, Iraq
Abstract
This paper aims at the improvement of expansive clays, by the addition of crushed limestone, obtained from
the waste of masonry factories situated in the polluted industrial area, to the east side of Mosul city. This
abandoned waste material creates serious environmental problems in the areas surrounding these factories
requiring an urgent solution to dispose of the huge quantities heaped in there.
Different percentages of the crushed limestone by weight (passing sieve No.40) were added namely (2, 4, 6,
8, and 10%) to the clay obtained from "Al-Wahda district in Mosul" to reduce its expansiveness and
improve its characteristics for many earth work construction. The test results showed pronounced reduction
in the plasticity of the clay and significant decrease in the swelling properties, in the range of more than
three and half times that of untreated one. These results represent very important factor for road
embankment constructions.
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